$ git clone -n https://gitee.com/opencloudos-stream/ghc-persistent.git /var/lib/mock/dist-oc9-epol-build-91527-59210/root/chroot_tmpdir/scmroot/ghc-persistent
Cloning into '/var/lib/mock/dist-oc9-epol-build-91527-59210/root/chroot_tmpdir/scmroot/ghc-persistent'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ghc-persistent
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at db2f8ec package init